Blanket octopus

The Blanket Octopus is a beauty, award-winning photo

https://www.nhm.ac.uk/wpy/gallery/2021-out-of-the-black

Maybe male blanket octopus

Octonation

Fun Facts About The Female Blanket Octopus (Superhero Of The Sea)

https://www.magnuslundgren.com/portfolio/G0000khlSnkDGoOM/I0000Muoz317eJls